I guess that the 5 new chunks are those showing as PD in the onstat -d output. Check that the volumes for the chunks are still available and any file permissions/ownerships match the other chunks (You should not have been able to add the chunks if they were wrong but worth checking.) Failing that get the engineer back.

1. Ensure your volume group is activated and your new disks are still visible. Did you bounce the server recently?

2. Check the online log file to see why it took the chunks off-line in the first place. Then work backwards from this, checking that everything is in place, as it should be - the chunk files(or links), the permissions, the logical volumes, the volume group, the disks. Then fix those things first.

3. Is this a MC/Servieguard cluster? If so, thenif your package switched nodes and you hadn't re-vgimported your volume group into this node then informix will show raw (lvol) chunks as being down because it wouldn't see the logical volumes. The solution in that case, is to vgimport the volume group to the current node, set the permissions of the chunks to 660, chown informix:informix, start up then engine and change the status of each chunk usingonspaces -s datadbs_a -p /informix/informix/datadbs_aX -o 0 -O

(thats -o [zero] -[capital] O on the end.)

If you are brave and have a backup taken before you added the chunks you could try forcing the chunks online anyway. Only do this if you are entirely sure that everything is OK at the HP-UX level and you have a backup.